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Influence of partially stripped impurity ions on the cyclotron absorption of the fast magnetosonic wave in TFR plasmas

TFR Group1986年被引用 2Nuclear FusionIF 3出版社

Injection of vanadium ions by the laser blowoff technique has permitted the impurity content in TFR plasmas to be modified purposely before ion cyclotron resonance (ICR) heating experiments in the mode conversion regime. The initial rate of increase in the central deuteron temperature TD(0) has thus been enhanced. By solving the wave propagation equation in the WKB approximation, it has been possible to account for the enhanced dTD(0)/dt value by wave energy deposition on resonating V21+ ions, provided a fraction (of the order of 10%) of these ions has been accelerated to the tens of keV range. Previous experimental ICR heating results, in conditions such that the proton cyclotron layer is outside the limiter radius, can be explained by similar resonance processes on intrinsic metal impurity ions.

日本語訳

レーザーブローオフ法によるバナジウムイオンの注入により、モード変換領域におけるイオンサイクロトロン共鳴(ICR)加熱実験の前に、TFRプラズマ中の不純物含有量を意図的に変更することが可能となった。これにより、中心重水素温度TD(0)の初期上昇率が増大した。WKB近似で波動伝播方程式を解くことにより、共鳴するV21+イオンへの波動エネルギー堆積によって、増大したdTD(0)/dtの値を説明することが可能となった。ただし、これらのイオンのうち約10%程度の割合が数十keVの範囲まで加速されることが条件となる。陽子サイクロトロン層がリミター半径の外側にある条件下での過去のICR加熱実験結果も、同様の共鳴過程が内在する金属不純物イオン上で生じることによって説明できる。

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Fusion Advanced Studies TorusImpurityMagnetosonic wavesTFR
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